HIGH HUMIDITY LEVELS AND TEMPERATURES IN THE UPPER 80S TO LOWER90S WILL PUSH THE HEAT INDEX INTO THE HAZARDOUS RANGE LATE THISAFTERNOON INTO EARLY THIS EVENING OVER EASTERN IOWA...FARNORTHEAST MISSOURI...AND WEST CENTRAL ILLINOIS. HEAT INDEXREADINGS AS HIGH AS 100 TO 103 ARE EXPECTED UNTIL AROUND 7 PM.

A COLD FRONT WILL BRING RELIEF IN THE FORM OF SCATTEREDTHUNDERSTORMS THIS EVENING...THEN COOLER TEMPERATURES AND LOWERHUMIDITY READINGS OVERNIGHT.

IF YOU PLAN TO BE OUTSIDE...AVOID PROLONGED EXPOSURE TO THE HEATOR STRENUOUS ACTIVITY. DRINK PLENTY OF FLUIDS TO AVOIDDEHYDRATION.

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Providing "weather, water cycle, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy."